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Chess Problem 2010g8d501

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2nd Comm., Chess Composition Microweb 28. TT, 2010

1B3*1R1K1/3p2B*1B/3P4/1BPk4/1P2p2*1R/7*1b/q4Pp1/8

#2
TRITON e8, h4:
NEREIDs a8, h7; h3: 

1.f3!      (2.fxe4#)

1...Qb1,Qc2 2.NDxe4-d3#
1...Qc4     2.TRxe4-d4#
1...Qe2     2.TRxe4-e3#

Each black defence guards e4, but also removes the guard on a8, allowing White to capture e4 with a Marine Piece and give mate. The mates are differentiated by the need to stop the bQ from getting to e4 and so annulling the check.

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